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    Tytuł:
    Shipborne satellite navigation systems receivers, exploitation remarks
    Autorzy:
    Januszewski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/359849.pdf
    Data publikacji:
    2014
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    GPS system
    GPS receiver
    shipborne GPS receiver
    type of GPS receivers
    Opis:
    Currently (July 2014) an uninterrupted information about the ship’s position can be obtained from specialized electronic position-fixing systems, in particular, Satellite Navigation Systems (SNSs) as GSP and GLONASS and Satellite Based Augmentation Systems (SBASs) as EGNOS or WAAS. On each ship’s bridge one GPS stationary receiver is installed at least but on many ships there are two or even more GPS receivers. Nowadays, several hundred different end-user products and broad/chipset/modules are available on the world market, however for ship’s bridge several dozen models provided by a dozen or so manufacturers are designed only. In this paper 309 GPS receivers, 47 different models of 12 manufacturers installed on 188 ships of different types and with different lengths were taken into account. The relations between the type and the length of the ship, the number of the GPS receivers installed on one ship, the manufacturers and the models the most frequently used are presented.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2014, 40 (112); 67-72
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Direct inventory taking of underwater objects using a handheld GPS receiver
    Autorzy:
    Popielarczyk, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/224876.pdf
    Data publikacji:
    2011
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    GPS receiver
    underwater object
    underwater navigation
    odbiornik GPS
    obiekt podwodny
    nawigacja podwodna
    Opis:
    The paper presents application of the GPS - Thales Mobile Mapper satellite navigation receiver for conducting the direct underwater inventory and location of objects on the bottom of inland water reservoirs. The design description of the measurement set consisting of the manual GPS/GIS receiver, specialist watertight casing with function keys and floating GPS antenna is presented. The possibilities of using the set directly in underwater navigation conducted by a scuba diver on shallow depth were investigated. The results of search for obstacles located earlier using the hydroacoustic methods: the single beam echo sounder (SBES) and sidescan sonar (SSS) were described. The analysis of accuracy of the underwater GPS navigation was also conducted.
    Źródło:
    Reports on Geodesy; 2011, z. 1/90; 383-390
    0867-3179
    Pojawia się w:
    Reports on Geodesy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    FPGA Implemetation of Acquisition Phase of the GPS Receiver Using XSG
    Autorzy:
    Hawary, Mohamed Ibrahiem El
    Hamza, Gihan Gomah
    Zekry, Abdelhalim
    Motawie, Ibrahiem Mohamed
    Powiązania:
    https://bibliotekanauki.pl/articles/963910.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    GPS receiver
    acquisition phase
    SDR
    Xilinx System Generator XSG
    FPGA implementation
    Opis:
    In the past it was usual to exert a huge effort in the design, simulation, and the real time implementation of the complicated electronic and communication systems, like GNSS receivers. The complexity of the system algorithms combined with the complexity of the available tools created a system that is difficult to track down for debugging or for redesign. So, the simulation and educational tools was different from the prototyping tools. In this paper the parallel search acquisition phase of a GPS receiver was simulated and implemented on FPGA using the same platform and through a graphical programming language. So this paper introduces the fruit of integrating the prototyping tools with the simulation tools as a single platform through which the complicated electronic systems can be simulated and prototyped.
    Źródło:
    International Journal of Electronics and Telecommunications; 2019, 65, 4; 739-744
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A method for the estimation of sideslip angle for a vehicle equipped with a one-antenna GPS measuring system for steady state movement
    Autorzy:
    Pieniążek, Wiesław
    Wolak, Stanisław
    Janczur, Robert
    Powiązania:
    https://bibliotekanauki.pl/articles/263758.pdf
    Data publikacji:
    2019
    Wydawca:
    Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
    Tematy:
    sideslip angle
    heading angle
    yaw angle
    yaw rate
    GPS receiver signals
    Opis:
    One-antenna GPS systems present no possibility for the direct determination of vehicle slip angle. This is an easy task for dual antenna systems; however, many users have this kind of apparatus. In this paper, a method of estimation of this parameter, which is important for the estimation of vehicle steerability factors, is proposed (e.g. TB factor calculated on the basis of data from input test [8]). The method is based on two parameters measured by a one-antenna GPS system; these are the heading angle created from the Doppler channel coming directly from the GPS engine, and the yaw rate measured by an IMU device integrated and cooperating with the GPS engine. The sideslip angle which was calculated according to the proposed method is compared with an equivalent angle calculated on the basis of data from a non-slip measurement of velocity components for selected point of vehicle acquired using. The presented method is illustrated with examples from real tests. In the author’s opinion, the sideslip angle calculated with the application of measurement data obtained from a one-antenna GPS device could be used in practice. From comparison with another upper mentioned method, it follows that the differences between average values of sideslip angles obtained from both considered methods is not greater than 8%.
    Źródło:
    Archiwum Motoryzacji; 2019, 84, 2; 137-146
    1234-754X
    2084-476X
    Pojawia się w:
    Archiwum Motoryzacji
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wykorzystanie pakietu Autodesk Land Solutions do opracowania projektów realizowanych techniką RTK GPS
    Application of the Autodesk Land Solutions software package to elaboration of RTK GPS projects
    Autorzy:
    Uznański, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/262265.pdf
    Data publikacji:
    2005
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    real time kinematic surveys
    software SR530 GPS receiver
    Autodesk Land Solutions
    Opis:
    W pracy przedstawiono wybrane możliwości zastosowania pomiarów RTK GPS z wykorzystaniem odbiorników SR530 firmy Leica z opcjonalnym oprogramowaniem inżynierskim do realizacji projektów geodezyjnych. Podano informacje na temat dostępnych opcji oprogramowania firmowego oraz możliwości odbiorników SR530 w zakresie współpracy z pakietem Autodesk Land Solutions w efektywniejszym opracowaniu danych geodezyjnych. Zamieszczono krótki opis aplikacji wchodzących w skład tego pakietu programów, akcentując możliwość współpracy w geodezyjnym opracowaniu danych dostarczonych z pomiarów techniką RTK GPS oraz w przygotowaniu danych do realizacji tą techniką.
    The paper presents selected possibilities of use of the Leica SR530 GPS receivers, furnished with optional engineering application programs, in realization of surveying tasks. Actually available firmware options are described and possibilities of cooperation of the SR530 receivers with the Autodesk Land Solutions package in effective processing of survey data are discussed. Package applications are presented in short, with stress on cooperation in processing of RTK GPS data, and on preparation of data for setting-out with this technique.
    Źródło:
    Geodezja / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie; 2005, 11, 2; 357-363
    1234-6608
    Pojawia się w:
    Geodezja / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An experimental investigation into the positioning accuracy of low-cost gps receivers in LabVIEW environment
    Eksperymentalne badanie dokładności pozycjonowania tanich odbiorników GPS w środowisku LabVIEW
    Autorzy:
    Pawłowski, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/266841.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
    Tematy:
    GNSS
    GPS receiver
    positioning accuracy
    LabVIEW
    GPS
    WGS-84
    odbiornik nawigacji satelitarnej
    dokładność pozycjonowania
    Opis:
    A major problem in the application of satellite navigation systems is the accuracy of position determination. The manufacturers of navigation receivers use a variety of indicators to describe their accuracy of positioning, which causes difficulty in comparing the parameters of different receivers. This study presents a measurement system that allows for experimental determination of satellite navigation systems positioning accuracy. The main element of the implemented system is an application developed in the LabVIEW which receives navigation data from the receiver, collects the appropriate amount of data, and then calculates selected positioning accuracy indicators and presents them in tabular and graphical form. Then relevant calculation formulas and sample measurement results for selected GPS receiver are presented.
    Istotnym problemem w stosowaniu systemów nawigacji satelitarnej jest ich dokładność wyznaczania pozycji geograficznej. Niestety producenci odbiorników GPS stosują różne wskaźniki opisujące dokładność pozycjonowania, co powoduje trudności w porównywaniu parametrów odbiorników różnych firm. Problem ten dotyczy zwłaszcza tanich i łatwo dostępnych odbiorników przeznaczonych do innych celów niż profesjonalna nawigacja, geodezja i zastosowania militarne. Dzięki niskiej cenie i coraz lepszym parametrom odbiorniki takie znajdują liczne zastosowania komercyjne w różnych dziedzinach nauki i techniki oraz w wielu wyrobach powszechnego użytku. W pracy przedstawiono system pomiarowy umożliwiający eksperymentalne wyznaczanie dokładności pozycjonowania takich odbiorników. Głównym jego elementem jest aplikacja opracowana w środowisku LabVIEW, która odbiera dane nawigacyjne w standardzie NMEA z badanego odbiornika, gromadzi ich odpowiednią ilość w pamięci komputera, oblicza wybrane wskaźniki dokładności pozycjonowania oraz przedstawia je w postaci tabelarycznej i graficznej. Zaprezentowano odpowiednie wzory obliczeniowe oraz wyniki pomiarów dla przykładowego odbiornika systemu GPS.
    Źródło:
    Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2015, 47; 139-142
    1425-5766
    2353-1290
    Pojawia się w:
    Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Let us prepare the officer of the watch on jamming and spoofing
    Autorzy:
    Felski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/117545.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    watchkeeping
    Global Positioning System (GPS)
    jamming
    spoofing
    Officer of the Watch (OOW)
    GPS Receiver
    GPS Signal
    GPS Accuracy
    Opis:
    The general accessibility and high accuracy of GPS caused that for a dozen or so years it is applied commonly, not only in marine navigation. We can ascertain that in this regard there exists the monopoly. However, now it is apparently that this system can be easily disturbed, what testify numerous reports. The problem has been treated as troubles in land navigation, however nowadays became every-day reality on coastal waters as well, especially on the Mediterranean and Black Seas and Persian Gulf. Officers who survived this tell that the first impulse in such situation is to verify GPS receiver, regardless of the situation around the ship. The concentration of the officer’s attention on the GPS receiver, especially on coastal waters creates the threat for the ship, however in this situation appear other threats which many officers does not associate with GPS. Usually on the present ship GPS receiver is not only the source of positioning information. It is a source of information for many other devices, so inappropriate work of it generates problems with many other processes on the ship. Today question is who on the bridge can notice GPS problems and how? There are receivers which do not inform about the problem, or present not realistic data. Sometimes only ECDIS picture shows some abnormality, for example still the same position while ship is under the way. On the paper the analysis of possibly aspects of the problem is discussed. Presented analysis goes to the conclusion that should be prepared some procedure how to proceed in case of the lack of GPS signals, as well as the watch officer should be prepared to act in such situation. This is a task for marine academies.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2019, 13, 4; 847-851
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Efekty nieantenowych rekonfiguracji wyposażenia stacji GPS w Borowcu w obserwowanych współrzędnych
    Non-antenna effects of equipment reconfiguration at Borowiec GPS station in observed coordinates
    Autorzy:
    Lehmann, M.
    Jaworski, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/210973.pdf
    Data publikacji:
    2010
    Wydawca:
    Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
    Tematy:
    wyposażenie stacji permanentnej GNSS (GPS)
    szeregi czasowe współrzędnych
    GPS receiver replacement
    GNSS (GPS) station coordinate
    comparison of time series
    Opis:
    W pracy przedstawiono analizę wpływu zmian poszczególnych elementów wyposażenia stacji permanentnej IGS "BOR1" w Borowcu na wyznaczane współrzędne. Zmiany objęły następujące elementy: odbiornik, komputer oraz taktowanie odbiornika zewnętrznym wzorcem częstotliwości. Do analizy wykorzystano szeregi współrzędnych stacji w Borowcu zarówno z obliczeń sieci globalnych IGS, jak z własnych z rozwiązań wektorów lokalnych do punktów w Poznaniu (POZN) i Warszawie (CBKA).
    The article presents the analysis of influence of different elements of the IGS BOR1 station equipment on computed coordinates. Changes concern the receiver, computer and time oscillator. For analysis we used time series of the BOR1 station coordinates, computed by global Analysis Centres and own solutions for local baselines between two receivers in Borowiec and stations POZN and CBKA.
    Źródło:
    Biuletyn Wojskowej Akademii Technicznej; 2010, 59, 2; 135-143
    1234-5865
    Pojawia się w:
    Biuletyn Wojskowej Akademii Technicznej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zastosowanie odbiorników nawigacji satelitarnej klasy turystycznej w szczegółowym planowaniu hodowlanym
    Autorzy:
    Bolibok, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1019729.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    bledy pomiarowe
    zastosowanie
    planowanie hodowlane
    nawigacja satelitarna
    lesnictwo
    odbiorniki GPS
    satellite navigation
    gps receiver
    silvicultural planning
    measurement error
    Opis:
    In detailed silvicultural planning, good knowledge of the internal situation (e.q. placement of advanced regeneration) in stand survey units is necessary. Information gathered in the framework of regular forest survey is not sufficient, specifically when natural stand regeneration is planned. The application of GPS is a practical, inexpensive, quick to operate technology of collecting information required for silvicultural planning and positioning spatial elements of a cutting system. As silviculture needs do not require such a high accuracy as in the case of positioning of stand survey units, it seems that the application of tourist−class GPS receivers is an optimum solution. This class equipment is inexpensive and easy to operate. The knowledge about possibilities which GPS receiver provides on the one hand and the awareness of limitations that forest environment creates for GPS measurements helps make a reliable draft of a stand's internal situation.
    Źródło:
    Sylwan; 2005, 149, 07; 37-50
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nominal and Real Accuracy of the GPS Position Indicated by Different Maritime Receivers in Different Modes
    Autorzy:
    Januszewski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/117133.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Global Navigation Satellite System (GNSS)
    Global Positioning System GPS
    Navigational System
    Navigational System Receiver
    Accuracy of Position
    GPS Receiver
    GPS Position Accuracy
    Dilution of Precision (DOP)
    Opis:
    Nowadays on the ship’s bridge two or even more GPS receivers are installed. As in the major cases the coordinates of the position obtained from these receivers differ the following questions can be posed – what is the cause of this divergence, which receiver in the first must be taken into account etc. Based on information published in annual GPS and GNSS receiver survey it was estimated the percentage of GPS receivers designed for marine and/or navigation users. The measurements of GPS position based on the four different stationary GPS receivers were realized in the laboratory of Gdynia Maritime University in Poland in the summer 2012. The coordinates of the position of all these receivers were registered at the same time. The measurements in mode 3D were made for different input data, the same for all receivers. The distances between the individual unit’s antenna were considered also. Next measurements in mode 3D also were realized on two ships in different European ports. Additional measurements were made in mode 2D with three receivers for different their’s antenna heights. The results showed that the GPS position accuracy depends on the type of the receiver and its technical parameters particularly.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2014, 8, 1; 11-19
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wykorzystanie sprzętu geodezyjnego do profilowania i kartowania geologicznego na przykładzie KWB Turów
    The use of geodetic equipment to the profiling and geological mapping on the example of Turów open cast mine
    Autorzy:
    Wiśniewski, J.
    Dąbrowska, E.
    Milkowska-Sidor, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/169268.pdf
    Data publikacji:
    2017
    Wydawca:
    Poltegor-Instytut Instytut Górnictwa Odkrywkowego
    Tematy:
    profilowanie skarp roboczych
    kartowanie
    tachimetr
    odbiornik GPS
    pomiar bezlustrowy
    profiling working slopes
    mapping
    total station
    GPS receiver
    reflectorless measurement
    Opis:
    Postęp technologiczny i techniczny, a przede wszystkim rozwój informatyczny nastąpił również w geologii górniczej. Przykładem tego są m.in. narzędzia wykorzystywane do prac kartograficznych przez geologów firmy PGE GiEK S.A. O/KWB Turów. W celu usprawnienia prac terenowych i dostosowania ich wyników do cyfrowej obróbki danych wdrożono do użytku zaawansowany sprzęt geodezyjny: odbiornik GPS oraz fototachimetr Leica TS-15. Profilowania i kartowania skarp oraz poziomów roboczych wykonywane są bezpieczniej, szybko i z większą dokładnością. Artykuł omawia etapy zmian metody pomiarów terenowych.
    Technological and technical progress and IT development, as also occurred in mining geology, as evidenced by the work of geologist from PGE GiEK S.A. O/KWB Turów. In order to improve fieldwork and adjustment of results to digital data processing implemented for use advanced geodetic equipment: GPS receiver and the Leica TS-15. Profiling and mapping slopes and working levels are exercised safely, quickly and precisely. The article discusses the steps in changing of field measurement method.
    Źródło:
    Górnictwo Odkrywkowe; 2017, 58, 3; 13-19
    0043-2075
    Pojawia się w:
    Górnictwo Odkrywkowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Matlab Implementation of Differential GPS for Low-cost GPS Receivers
    Autorzy:
    Ali, Q
    Montenegro, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/116127.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    marine navigation
    Global Positioning System GPS
    Matlab, Differential GPS (DGPS)
    GPS Receiver
    unmanned aerial vehicle (UAV)
    Global Navigation Satellite System (GNSS)
    RINEX Format
    Opis:
    A number of public codes exist for GPS positioning and baseline determination in off-line mode. However, no software code exists for DGPS exploiting correction factors at base stations, without relying on double difference information. In order to accomplish it, a methodology is introduced in MATLAB environment for DGPS using C/A pseudoranges on single frequency L1 only to make it feasible for low-cost GPS receivers. Our base station is at accurately surveyed reference point. Pseudoranges and geometric ranges are compared at base station to compute the correction factors. These correction factors are then handed over to rover for all valid satellites observed during an epoch. The rover takes it into account for its own true position determination for corresponding epoch. In order to validate the proposed algorithm, our rover is also placed at a pre-determined location. The proposed code is an appropriate and simple to use tool for post-processing of GPS raw data for accurate position determination of a rover e.g. Unmanned Aerial Vehicle during post-mission analysis.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2014, 8, 3; 343-350
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Time server based on NMEA and SNTP Protocols
    Autorzy:
    Łukasik, Z.
    Nowakowski, W.
    Ciszewski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/116756.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    time service
    NMEA Protocol
    SNTP Protocol
    time server
    time synchronization
    Computer Network
    GPS receiver
    Universal Time Coordinated (UTC)
    Opis:
    Modern technical ship systems very often use information and communication technologies. One of the basic requirements of these systems is ensuring time synchronization that aim is to coordinate clocks of all devices working in a computer network. This requirement results from, among others, the necessity to log events with a unified timestamp. To achieve this goal, most frequently expensive time servers are used. This article presents an easy method of time synchronization, which can serve as a reserve or alternative solution to the methods currently used. That is why a proprietary software has been developed, allowing to expand the functionality of a PC so that it can operate as a time server. A time reference in proposed solution would be provided by a GPS receiver. The developed application allows, with the use of the NMEA protocol, to synchronize the current time with the GPS receiver and then, with the help of the SNTP protocol, to distribute it to all network devices operating on the ship.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2020, 14, 2; 453-458
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Applications of global navigation satellite systems in maritime navigation
    Autorzy:
    Januszewski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/135402.pdf
    Data publikacji:
    2016
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    GNSS
    GPS system
    GNSS receiver
    shipborne GPS and GNSS receiver
    type of GPS and GNSS receivers
    maritime navigation
    Opis:
    Currently (April 2016) uninterrupted information about a ship’s position can be obtained from specialized electronic position-fixing systems, in particular, Satellite Navigation Systems (SNSs) such as GPS and GLONASS and Satellite Based Augmentation Systems (SBASs) such as EGNOS or WAAS. The generic name given to all the above mentioned systems is Global Navigation Satellite Systems (GNSS). Many models, designed for the ship’s bridge and provided by about a dozen manufacturers, are available on the world market. In Europe, one of the most comprehensive sources of knowledge on the global GNSS market is a report published, on average, every 15 months by the European GNSS Agency GSA. Another receiver survey is published each year in the January number of the magazine “GPS World”. The detailed analysis of market report and receiver survey, possible use of EGNOS and Galileo in the maritime market, and different maritime applications of GNSS equipment are described in this paper.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2016, 47 (119); 74-79
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design and analysis of spoofing detection algorithms for GNSS signals
    Autorzy:
    Dobryakova, L.
    Lemieszewski, Ł.
    Ochin, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/359990.pdf
    Data publikacji:
    2014
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    GNSS
    GPS
    NAVSTAR
    GLONASS
    Spoofing
    Dual-Receiver
    Opis:
    Many civil GNSS (Global Navigation Satellite System) applications need secure, assured information for asset tracking, fleet management and the like. But there is also a growing demand for geosecurity locationbased services. Unfortunately, GNSS is vulnerable to malicious intrusion and spoofing. How can users be sure the information they receive is authentic? Spoofing is the transmission of matched-GNSS-signalstructure interference in an attempt to commandeer the tracking loops of a victim receiver and thereby manipulate the receiver’s timing or navigation solution. A spoofer can transmit its counterfeit signals from a stand-off distance of several hundred meters or it can be co-located with its victim. Spoofing attacks can be classified as simple, intermediate, or sophisticated in terms of their effectiveness and subtlety. In an intermediate spoofing attack, a spoofer synchronizes its counterfeit signals with the authentic GNSS signals so they are code-phase-aligned at the target receiver. In this paper we consider the anti-spoofing algorithms based on spoofing detection via Dual-Receiver.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2014, 40 (112); 47-52
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design and Development of Miniature Dual Antenna GPS-GLONASS Receiver for Uninterrupted and Accurate Navigation
    Autorzy:
    Sudhir, N. S.
    Manvi, S. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/307676.pdf
    Data publikacji:
    2014
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    dual-antenna receiver
    embedded system
    GLONASS
    GPS
    miniaturization
    Opis:
    Global Positioning System (GPS), Global Navigation Satellite System (GLONASS), and GPS-GLONASS receivers are commonly used for navigation. However, there are some applications where a single antenna interface to a GPS or GPS-GLONASS receiver will not suffice. For example, an airborne platform such as an Unmanned Aerial Vehicles (UAV) will need multiple antennae during maneuvering. Also, some applications will need redundancy of antenna connectivity to prevent loss of positioning if a link to satellite fails. The scope of this work is to design a dual antenna GPS-GLONASS navigation receiver and implement it in a very small form-factor to serve multiple needs such as: provide redundancy when a link fails, and provide uninterrupted navigation even under maneuvering, also provide improved performance by combining data from both signal paths. Both hardware and software architectures are analyzed before implementation. A set of objectives are identified for the receiver which will serve as the benchmarks against which the receiver will be validated. Both analysis and objectives are highlighted in this paper. The results from the tests conducted on such a dual antenna GPS-GLONASS receiver have given positive results on several counts that promise a wider target audience for such a solution.
    Źródło:
    Journal of Telecommunications and Information Technology; 2014, 4; 108-115
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Accuracy analysis of aircraft positioning using GPS dual receivers in aerial navigation
    Autorzy:
    Krasuski, Kamil
    Ciećko, Adam
    Wierzbicki, Damian
    Powiązania:
    https://bibliotekanauki.pl/articles/2173448.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    GPS
    accuracy
    receiver
    position errors
    dokładność
    odbiornik
    błędy położenia
    Opis:
    . This study presents a modified algorithm to determine the accuracy of GPS positioning in aerial navigation. To achieve this, a mixed model with measurement weights was used to determine the resultant value of accuracy of aerial vehicle positioning. The measurement weights were calculated as a function of the number of GPS tracking satellites. The calculations were performed on actual GPS measurement data recorded by two onboard GNSS receivers installed onboard a Cessna 172 aircraft. The flight test was conducted around the military airport in Dęblin. The conducted analyses demonstrated that the developed algorithm improved the accuracy of GPS positioning from 62 to 91% for horizontal coordinates and between 16-83% for the vertical component of the aerial vehicle position in the BLh ellipsoidal frame. The obtained test results show that the developed method improves the accuracy of aircraft position and could be applied in aerial navigation.
    Źródło:
    Zeszyty Naukowe. Transport / Politechnika Śląska; 2022, 115; 23--34
    0209-3324
    2450-1549
    Pojawia się w:
    Zeszyty Naukowe. Transport / Politechnika Śląska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Badania dokładności pomiaru pozycji wyznaczanej za pomocą wybranego odbiornika GPS w warunkach statycznych i dynamicznych
    Research of positioning precision by the selected GPS receiver in static and dynamic conditions
    Autorzy:
    Kęska, W.
    Ratajczak, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/337079.pdf
    Data publikacji:
    2005
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
    Tematy:
    system pozycjonowania
    GPS
    odbiornik
    dokładność
    pomiar
    pozycjonowanie
    rolnictwo precyzyjne
    GPS positioning
    receiver
    measurement
    accuracy
    precision agriculture
    Opis:
    Globalny system pozycjonowania (GPS) wzbudza znaczne zainteresowanie rolnictwa, otwierając drogę do realizacji zasad tzw. rolnictwa precyzyjnego. Potrzebna jest zatem dobra znajomość możliwości i ograniczeń odbiorników GPS oferowanych przez wielu producentów. W artykule omówiono wyniki badań publikowane w literaturze, dotyczące kilku stosowanych w rolnictwie odbiorników GPS, oraz wyniki badań własnych wybranego odbiornika, który ze względu na stosunkowo dobre parametry techniczne i niską cenę ma szansę znaleźć szersze zastosowanie w polskim rolnictwie. Określono dokładność pomiaru pozycji geograficznej maszyny tym odbiornikiem w warunkach statycznych i dynamicznych oraz ewentualne zakresy jego zastosowania.
    Global positioning system (GPS) involves a great notice in agriculture, opening the road to realisation of the precision agriculture. There is a great need to know all the possibilities and boundaries of the systems offered on the market. In this article the short overview of the results of field tests of some commonly applied in agriculture GPS receivers is described, as well as the own research results of stationary and dynamic tests of the selected receiver, which taking into account its good technical parameters and low price has the chance to be widely applied in Polish agriculture.
    Źródło:
    Journal of Research and Applications in Agricultural Engineering; 2005, 50, 1; 10-15
    1642-686X
    2719-423X
    Pojawia się w:
    Journal of Research and Applications in Agricultural Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Określenie poprawki chodu zegara odbiornika w eksperymencie lotniczym z zastosowaniem sensora GPS
    Determination receiver clock bias using GPS sensor in flight test
    Autorzy:
    Krasuski, K.
    Jafernik, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/314532.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Naukowo-Wydawniczy "SPATIUM"
    Tematy:
    zegar odbiornika
    GPS
    metoda PPP
    GAPS
    magic PPP
    receiver clock
    PPP method
    Opis:
    W artykule omówiono problem wyznaczenia poprawki chodu zegara odbiornika z użyciem obserwacji GPS w eksperymencie lotniczym. W pracy określono wartości poprawki chodu zegara odbiornika dla metody PPP w programach CSRS-PPP, GAPS oraz magicPPP. Obliczenia zostały zrealizowane dla dwuczęstotliwościowych obserwacji kodowo-fazowych GPS z odbiornika Topcon HiperPro. Eksperyment badawczy został zrealizowany z wykorzystaniem samolotu Cessna 172 w dniu 01.06.2010 r. w okolicach lotniska wojskowego w Dęblinie.
    The article discusses the problem of finding the correction of receiver clock bias using GPS observations in the flight experiment. The study determined the correction of receiver clock bias for the method of PPP in the CSRS-PPP and magicPPP softwares. Calculations were carried out for the dual frequency GPS code and phase observations from Topcon HiperPro receiver. Research experiment was carried out using a Cessna 172 aircraft on 01.06.2010 around the military aerodrome in Deblin.
    Źródło:
    Autobusy : technika, eksploatacja, systemy transportowe; 2017, 18, 6; 834-837, CD
    1509-5878
    2450-7725
    Pojawia się w:
    Autobusy : technika, eksploatacja, systemy transportowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    R-Mode receiver development for medium frequency signals
    Autorzy:
    Grundhöfer, L.
    Gewies, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/134934.pdf
    Data publikacji:
    2018
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    Global Navigation Satellite Systems
    GNSS
    GPS
    R-mode technology
    R-mode receiver
    LORAN-C
    maritime radio beacons
    Opis:
    Signals from Global Navigation Satellite Systems are the primary source for Position, Navigation and Time (PNT) information onboard any vessel today. As these signals are prone to interference, a maritime backup system is needed to provide reliable PNT data, R(anging)-Mode is such a system. It utilizes existing maritime radio beacons or base stations of the Automatic Identification System (AIS) by adding ranging components to the legacy signals. The first modified radio beacons transmit medium frequency (MF) R-Mode signals in northern Germany. This paper has described the current state of the authors’ research and development activities at the receiver level for MF R-Mode signals. The receiver platform has been introduced, which was based on off-theshelf components and the implemented algorithms for distance estimation have been explained. Furthermore, the results of the first ranging measurements have been presented, which have shown the general suitability of the R-Mode technology as a source for maritime positioning and timing data.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2018, 56 (128); 57-62
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design of the dual constellation GPS/GALILEO mobile device for improving navigation of the visually impaired in an urban area
    Autorzy:
    Drypczewski, K.
    Moszyński, M.
    Demkowicz, J.
    Bikonis, K.
    Stepnowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/258979.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    dual constellation receiver
    GPS
    Galileo
    voice maps
    navigation for the blind
    visually impaired
    personal navigation device
    PND
    Opis:
    The article discusses damages of essential tribological associations in crankshaft and piston systems of large power two-stroke engines used as main engines, which take place during transport tasks performed by those ships. Difficulties are named which make preventing those damages impossible, despite the fact that the technical state of engines of this type is identified with the aid of complex diagnostic systems making use of advanced computer technology. It is demonstrated that one of causes of the damages is the lack of research activities oriented on recognising random properties of the loads leading to those damages. A proposal is made for the loads acting at a given time t on tribological associations in crankshaft and piston systems of internal combustion engines used as main engines to be considered as random variables Qt. At the same time the loads examined within a given time interval tr ≤ t ≤ tz would be considered stochastic processes {Q(t): t ≥ 0}. Essential properties of the loads of the abovementioned tribological associations are named and explained by formulating hypotheses which need empirical verification. Interval estimation is proposed for estimating the expected value E(Qt) of the load Qt acting at time t. A relation is indicated between the mechanical load and the thermal load acting on tribological associations in the ship main engine crankshaft and piston system. A suggestion is formulated that a stochastic form of the relation between these types of load is to be searched for, rather than statistic relation, and a proposal is made to measure the intensity (strength) of the stochastic relation using the Czuprow’s convergence coefficient.
    Źródło:
    Polish Maritime Research; 2015, 4; 15-20
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modern methods of use of geographic maps in field research for localisation of objects
    Autorzy:
    Macioch, Andrzej
    Mikulska, Małgorzata
    Powiązania:
    https://bibliotekanauki.pl/articles/2032524.pdf
    Data publikacji:
    2006-06-01
    Wydawca:
    Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
    Tematy:
    field work
    elements of mathematical basis
    GPS
    calibration
    paper map
    digital map
    vector map
    satellite receiver
    geographic coordinates
    Opis:
    In the paper the author described briefly modern technical possibilities of supporting the use of maps in field research and presented methods of map use in localisation of objects. In his description of the methods the author presented the differences in the approach to the problem depending on the features of the maps, both paper and digital ones. He also stressed the issue of adjustment of the features related to the cartometricity of the maps in use to the coordinate system in which the data reąuired for the field projects are obtained and processed.
    Źródło:
    Miscellanea Geographica. Regional Studies on Development; 2006, 12; 297-304
    0867-6046
    2084-6118
    Pojawia się w:
    Miscellanea Geographica. Regional Studies on Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling GPS positioning performance in Northwest Passage during extreme space weather conditions
    Autorzy:
    Špoljar, D.
    Jukić, O.
    Sikirica, N.
    Lenac, K.
    Filjar, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1841553.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Global Positioning System
    Northwest Passage
    Global Navigation Satellite System
    Software Defined Radio (SDR)
    GNSS SDR Receiver
    GPS Position
    Opis:
    New shipping routes are emerging as a result of iceberg melting in polar regions, allowing for more efficient transport of people and goods. Opening of the Northwest Passage, the maritime route connecting Pacific Ocean with Atlantic Ocean through Arctic region, is considered such a development. The increasing transport exploitation of the Northwest Passage requires the quality assessment of maritime navigation aids for compliance with the established requirements. Here we contribute to the subject with addressing the polar commercial-grade GPS positioning performance in the Northwest Passage in the extreme positioning environment conditions during the massive 2003 space weather storm, a space weather event similar to the Carrington Storm of 1859, the largest space weather event recorded. The GPS positioning environment in the Northwest Passage during the Carrington-like storm in 2003 was reconstructed through the GNSS SDR receiver-post processing of the experimental GPS observations. The raw GPS dual-frequency pseudoranges and navigation messages were collected at the International GNSS Service (IGS) reference station at Ulukhaktok, Victoria Island, Canada. Pseudorange processing and GPS position estimation were performed in three scenarios of pre-mitigation of the ionospheric effects, known as the single major contributor GPS positioning error: (i) no corrections applied, (ii) Klobuchar-based corrected GPS positioning, and (iii) dual-frequency corrected GPS positioning. Resulting GPS positioning error vectors were derived as positioning error residuals from the known reference station position. Statistical properties of the northing, easting, and vertical components of the GPS positioning error vector were analyzed with a software developed in the R environment for statistical computing to select suitable methods for the GPS positioning error prediction model development. The analysis also identified the most suitable theoretical fit for experimental statistical distributions to assist the model development. Finally, two competitive GPS positioning error prediction models were developed, based on the exponential smoothing (reference) and the generalized regression neural networks (GRNN) (alternative) methods. Their properties were assessed to recommend their use as mitigation methods for adverse massive space weather effects in polar regions.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2021, 15, 1; 165-169
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Use of a least squares with conditional equations method in positioning a tramway track in the Gdansk agglomeration
    Autorzy:
    Czaplewski, K.
    Specht, C.
    Dąbrowski, P.
    Specht, M.
    Wiśniewski, Z.
    Koc, W.
    Wilk, A.
    Karwowski, K.
    Chrostowski, P.
    Szmagliński, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/116443.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Least Squares Method (LSQ)
    Conditional Equations Method
    tramway track
    Gdansk Agglomeration
    MathCad
    rail vehicle trajectory
    Global Positioning System (GPS)
    satNav receiver
    Opis:
    Satellite measurement techniques have been used for many years in different types of human activity, including work related to staking out and making use of rail infrastructure. First and foremost, satellite techniques are applied to determine the tramway track course and to analyse the changes of its position during its operation. This paper proposes using the least squares with conditional equations method, known in geodesy (LSce). When applied, this method will allow for improvement of the final determination accuracy. This paper presents a simplified solution to the LSce alignment problem. The simplification involves replacement of the parameter binding equations with equivalent observational equations with properly selected weights. The results obtained with such a solution were demonstrated with a randomly selected section of a tramway track in Gdańsk. The article presents the theoretical foundations of the test method, the experiment organisation and the results obtained with MathCad Prime 3.0 software. It also presents the outcome of a study associated with the execution of the project No POIR.04.01.01-00-0017/17 entitled “Developing an innovative method of precision determination of a rail vehicle trajectory” executed by a consortium of the Gdańsk University of Technology and Gdynia Maritime University.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2019, 13, 4; 895-900
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An SDR-based Study of Multi-GNSS Positioning Performance During Fast-developing Space Weather Storm
    Autorzy:
    Filić, M.
    Filjar, R.
    Ruotsalainen, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/117597.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Global Navigation Satellite System (GNSS)
    utilization of GNSS
    Global Positioning System (GPS)
    GLONASS
    RTKLIB
    multi-GNSS
    space weather storm
    GNSS SDR Receiver
    Opis:
    The understanding of the ionospheric effects on GNSS positioning performance forms an essential pre-requisite for resilient GNSS development. Here we present the results of a study of the effects of a fast-developing space weather disturbance on the positioning performance of a commercial-grade GPS+GLONASS receiver. Using experimentally collected pseudoranges and the RTKLIB, an open-source software-defined GNSS radio receiver operating in the simulation mode, we assessed GNSS positioning performance degradations for various modes of GNSS SDR receiver operation, and identified the benefits of utilisation of multi-GNSS and ionospheric error correction techniques.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2016, 10, 3; 395-400
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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